branch Attitude Adjustment

git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@33625 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 817 insertions, 0 deletions

diff --git a/target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c b/target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c
new file mode 100644
index 000000000..79037da49
--- /dev/null
+++ b/target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c
@@ -0,0 +1,817 @@
+/*
+ * drivers/serial/ubi32_serdes.c
+ *   Ubicom32 On-Chip Serial Driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <linux/platform_device.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial_core.h>
+
+#include <asm/ip5000.h>
+#include <asm/ubicom32suart.h>
+
+
+#define SERIAL_UBICOM_PIN_RXD	(1 << 0)
+#define SERIAL_UBICOM_PIN_TXD	(1 << 6)
+#define SERIAL_UBICOM_CTL0	0x8b300000
+#define SERIAL_UBICOM_CTL1	0x00000009
+
+#define SERIAL_UBICOM_DATA_BIT	8	/* Fixed parameter - do not change */
+#define SERIAL_UBICOM_PAR_BIT	0	/* Fixed parameter - do not change */
+#define SERIAL_UBICOM_STOP_BIT	1	/* Fixed parameter - do not change */
+
+/* UART name and device definitions */
+#define UBI32_SERDES_NAME	"ttyUS" // XXX
+#define UBI32_SERDES_MAJOR	206 // XXX
+#define UBI32_SERDES_MINOR	64 // XXX
+
+#define PORT_UBI32_SERDES	1234
+#define NR_PORTS 1
+
+struct uart_port ubi32_serdes_ports[NR_PORTS];
+
+struct ubi32_serdes_resource {
+	void *uart_base_addr;
+	int uart_irq;
+	int uart_clock;
+} ubi32_serdes_resource[NR_PORTS] = {
+	/*
+	 * Get params from kernel command line (required for early printk)
+	 * or from platform resources.
+	 */
+	{0, 0, 0}
+};
+
+/*
+ * Can get overridden by 'serdes=' kernel command line.
+ */
+static int ubi32_serdes_default_baud_rate = 115200;
+
+
+#define IO_PORT(port) ((struct ubicom32_io_port *)port->membase)
+#define IO_PORT_INT_STATUS(port) (IO_PORT(port)->int_status)
+#define IO_PORT_INT_MASK(port) (IO_PORT(port)->int_mask)
+#define IO_PORT_INT_CLR(port) (IO_PORT(port)->int_clr)
+
+
+/*
+ * ubi32_serdes_get_char()
+ */
+static u8_t ubi32_serdes_get_char(struct ubicom32_io_port *io_port)
+{
+	/*
+	 * Read from hardware (forced 32-bit atomic read).
+	 */
+	u32_t data = 0;
+
+	if ( io_port ) {
+		io_port->int_clr = IO_PORTX_INT_SERDES_RXBF;
+		asm volatile (
+			"move.4		%0, %1		\n\t"
+			: "=r" (data)
+			: "m" (*(u32_t *)&(io_port->rx_fifo))
+			);
+	}
+
+	return (u8_t)(data & 0x000000ff);
+}
+
+/*
+ * ubi32_serdes_put_char()
+ */
+static void ubi32_serdes_put_char(struct ubicom32_io_port *io_port, u8_t c)
+{
+	u32_t data = 0x0000fe00 | (c << 1);
+
+	if ( io_port ) {
+		/*
+		 * Fixed data format:
+		 * [LSB]1 start bit - 8 data bits - no parity - 1 stop bit[MSB]
+		 */
+		io_port->int_clr = IO_PORTX_INT_SERDES_TXBE;
+		io_port->ctl2 = data;
+		io_port->int_set = IO_PORTX_INT_SERDES_TXBUF_VALID;
+	}
+}
+
+static void ubi32_serdes_hw_init(struct uart_port *port, int baud)
+{
+	struct ubicom32_io_port *io_port = IO_PORT(port);
+
+	if ( io_port ) {
+		/*
+		 * Put port functions 1-4 into reset state.
+		 * Function 0 (GPIO) does not need or have a reset bit.
+		 *
+		 * Select SERDES function for restart below.
+		 */
+		io_port->function =
+			IO_FUNC_FUNCTION_RESET(1) | IO_FUNC_FUNCTION_RESET(2) |
+			IO_FUNC_FUNCTION_RESET(3) | IO_FUNC_FUNCTION_RESET(4) |
+			IO_PORTX_FUNC_SERDES;
+
+		/*
+		 * Configure SERDES baudrate
+		 */
+		if ( baud == 0 ) {
+			baud = ubi32_serdes_default_baud_rate;
+		}
+
+		io_port->ctl0 =
+			SERIAL_UBICOM_CTL0 |
+			((port->uartclk / (16 * baud)) - 1);
+
+		io_port->ctl1 =
+			SERIAL_UBICOM_CTL1;
+
+		/*
+		 * don't interrupt until startup and start_tx
+		 */
+		io_port->int_mask = 0;
+
+		/*
+		 * Set TXD pin output, RXD input and prevent GPIO
+		 * override on the TXD & RXD pins
+		 */
+		io_port->gpio_ctl &= ~SERIAL_UBICOM_PIN_RXD;
+		io_port->gpio_ctl |= SERIAL_UBICOM_PIN_TXD;
+		io_port->gpio_mask &= ~(SERIAL_UBICOM_PIN_RXD | SERIAL_UBICOM_PIN_TXD);
+
+		/*
+		 * Restart (un-reset) the port's SERDES function.
+		 */
+		io_port->function &= ~(IO_FUNC_FUNCTION_RESET(IO_PORTX_FUNC_SERDES));
+	}
+}
+
+#define ULITE_STATUS_RXVALID IO_PORTX_INT_SERDES_RXBF
+#define ULITE_STATUS_OVERRUN 0
+#define ULITE_STATUS_FRAME 0
+#define ULITE_STATUS_PARITY 0
+#define ULITE_STATUS_TXEMPTY IO_PORTX_INT_SERDES_TXBE
+#define ULITE_STATUS_TXFULL 0
+
+static int ubi32_serdes_receive(struct uart_port *port, int stat)
+{
+	struct tty_struct *tty = port->info->port.tty;
+	unsigned char ch = 0;
+	char flag = TTY_NORMAL;
+
+	if ((stat & (ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
+		     | ULITE_STATUS_FRAME)) == 0)
+		return 0;
+
+	/* stats */
+	if (stat & ULITE_STATUS_RXVALID) {
+		port->icount.rx++;
+		ch = ubi32_serdes_get_char((struct ubicom32_io_port *)port->membase);
+
+		if (stat & ULITE_STATUS_PARITY)
+			port->icount.parity++;
+	}
+
+	if (stat & ULITE_STATUS_OVERRUN)
+		port->icount.overrun++;
+
+	if (stat & ULITE_STATUS_FRAME)
+		port->icount.frame++;
+
+
+	/* drop byte with parity error if IGNPAR specificed */
+	if (stat & port->ignore_status_mask & ULITE_STATUS_PARITY)
+		stat &= ~ULITE_STATUS_RXVALID;
+
+	stat &= port->read_status_mask;
+
+	if (stat & ULITE_STATUS_PARITY)
+		flag = TTY_PARITY;
+
+	stat &= ~port->ignore_status_mask;
+
+	if (stat & ULITE_STATUS_RXVALID)
+		tty_insert_flip_char(tty, ch, flag);
+
+	if (stat & ULITE_STATUS_FRAME)
+		tty_insert_flip_char(tty, 0, TTY_FRAME);
+
+	if (stat & ULITE_STATUS_OVERRUN)
+		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+
+	return 1;
+}
+
+/*
+ * interrupts are disabled on entry
+ */
+static void ubi32_serdes_stop_tx(struct uart_port *port)
+{
+	IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) & ~IO_PORTX_INT_SERDES_TXBE;
+}
+
+static int ubi32_serdes_transmit(struct uart_port *port, int stat)
+{
+	struct circ_buf *xmit  = &port->info->xmit;
+
+	if (!(stat & IO_PORTX_INT_SERDES_TXBE))
+		return 0;
+
+	if (port->x_char) {
+		ubi32_serdes_put_char(IO_PORT(port), port->x_char);
+		port->x_char = 0;
+		port->icount.tx++;
+		return 1;
+	}
+
+	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+		ubi32_serdes_stop_tx(port);
+		return 0;
+	}
+
+	ubi32_serdes_put_char(IO_PORT(port), xmit->buf[xmit->tail]);
+	xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);
+	port->icount.tx++;
+
+	/* wake up */
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(port);
+
+	if (uart_circ_empty(xmit))
+		ubi32_serdes_stop_tx(port);
+
+	return 1;
+}
+
+/*
+ * port is locked and interrupts are disabled
+ */
+static void ubi32_serdes_start_tx(struct uart_port *port)
+{
+	IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) | IO_PORTX_INT_SERDES_TXBE;
+	ubi32_serdes_transmit(port, IO_PORT_INT_STATUS(port));
+}
+
+/*
+ * Interrupts are enabled
+ */
+static void ubi32_serdes_stop_rx(struct uart_port *port)
+{
+	/* don't forward any more data (like !CREAD) */
+	port->ignore_status_mask = IO_PORTX_INT_SERDES_RXBF;
+}
+
+/*
+ * Set the modem control timer to fire immediately.
+ */
+static void ubi32_serdes_enable_ms(struct uart_port *port)
+{
+	/* N/A */
+}
+
+static irqreturn_t ubi32_serdes_isr(int irq, void *dev_id)
+{
+	struct uart_port *port = dev_id;
+	int busy;
+
+	spin_lock(&port->lock);
+
+	do {
+		int stat = IO_PORT_INT_STATUS(port);
+		busy  = ubi32_serdes_receive(port, stat);
+		busy |= ubi32_serdes_transmit(port, stat);
+	} while (busy);
+
+	tty_flip_buffer_push(port->info->port.tty);
+
+	spin_unlock(&port->lock);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Return TIOCSER_TEMT when transmitter is not busy.
+ */
+static unsigned int ubi32_serdes_tx_empty(struct uart_port *port)
+{
+	unsigned long flags;
+	unsigned int ret;
+
+	spin_lock_irqsave(&port->lock, flags);
+	ret = IO_PORT_INT_STATUS(port);
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0;
+}
+
+static unsigned int ubi32_serdes_get_mctrl(struct uart_port *port)
+{
+	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+}
+
+static void ubi32_serdes_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+	/* N/A */
+}
+
+/*
+ * Interrupts are always disabled.
+ */
+static void ubi32_serdes_break_ctl(struct uart_port *port, int break_state)
+{
+	/* N/A */
+}
+
+static int ubi32_serdes_startup(struct uart_port *port)
+{
+	if (request_irq(port->irq, ubi32_serdes_isr, IRQF_DISABLED,
+	     "UBI32_SERDES", port)) {
+		printk(KERN_NOTICE "Unable to attach port interrupt\n");
+		return -EBUSY;
+	}
+
+	IO_PORT_INT_CLR(port) = IO_PORTX_INT_SERDES_RXBF;
+	IO_PORT_INT_MASK(port) = IO_PORTX_INT_SERDES_RXBF;
+	return 0;
+}
+
+static void ubi32_serdes_shutdown(struct uart_port *port)
+{
+	struct ubi32_serdes_port *uart = (struct ubi32_serdes_port *)port;
+
+	IO_PORT_INT_MASK(port) = 0;
+	free_irq(port->irq, uart);
+}
+
+static void
+ubi32_serdes_set_termios(struct uart_port *port, struct ktermios *termios,
+		   struct ktermios *old)
+{
+	unsigned long flags;
+	unsigned int baud;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	port->read_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
+		| ULITE_STATUS_TXFULL;
+
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |=
+			ULITE_STATUS_PARITY | ULITE_STATUS_FRAME;
+
+	port->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |= ULITE_STATUS_PARITY
+			| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
+
+	/* ignore all characters if CREAD is not set */
+	if ((termios->c_cflag & CREAD) == 0)
+		port->ignore_status_mask |=
+			ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY
+			| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
+
+	/* update timeout */
+	baud = uart_get_baud_rate(port, termios, old, 0, 460800);
+	uart_update_timeout(port, termios->c_cflag, baud);
+
+	IO_PORT(port)->ctl0 = SERIAL_UBICOM_CTL0 |
+			((port->uartclk / (16 * baud)) - 1);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static const char *ubi32_serdes_type(struct uart_port *port)
+{
+	return port->type == PORT_UBI32_SERDES ? "UBI32_SERDES" : NULL;
+}
+
+/*
+ * Release the memory region(s) being used by 'port'.
+ */
+static void ubi32_serdes_release_port(struct uart_port *port)
+{
+}
+
+/*
+ * Request the memory region(s) being used by 'port'.
+ */
+static int ubi32_serdes_request_port(struct uart_port *port)
+{
+	return 0;
+}
+
+/*
+ * Configure/autoconfigure the port.
+ */
+static void ubi32_serdes_config_port(struct uart_port *port, int flags)
+{
+	if (flags & UART_CONFIG_TYPE &&
+	    ubi32_serdes_request_port(port) == 0)
+		port->type = PORT_UBI32_SERDES;
+}
+
+/*
+ * Verify the new serial_struct (for TIOCSSERIAL).
+ * The only change we allow are to the flags and type, and
+ * even then only between PORT_UBI32_SERDES and PORT_UNKNOWN
+ */
+static int
+ubi32_serdes_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+	return 0;
+}
+
+static struct uart_ops ubi32_serdes_pops = {
+	.tx_empty	= ubi32_serdes_tx_empty,
+	.set_mctrl	= ubi32_serdes_set_mctrl,
+	.get_mctrl	= ubi32_serdes_get_mctrl,
+	.stop_tx	= ubi32_serdes_stop_tx,
+	.start_tx	= ubi32_serdes_start_tx,
+	.stop_rx	= ubi32_serdes_stop_rx,
+	.enable_ms	= ubi32_serdes_enable_ms,
+	.break_ctl	= ubi32_serdes_break_ctl,
+	.startup	= ubi32_serdes_startup,
+	.shutdown	= ubi32_serdes_shutdown,
+	.set_termios	= ubi32_serdes_set_termios,
+	.type		= ubi32_serdes_type,
+	.release_port	= ubi32_serdes_release_port,
+	.request_port	= ubi32_serdes_request_port,
+	.config_port	= ubi32_serdes_config_port,
+	.verify_port	= ubi32_serdes_verify_port,
+};
+
+static void __init ubi32_serdes_init_ports(void)
+{
+	int i;
+
+	for (i = 0; i < NR_PORTS; i++) {
+		ubi32_serdes_ports[i].uartclk   = ubi32_serdes_resource[i].uart_clock;
+		ubi32_serdes_ports[i].ops       = &ubi32_serdes_pops;
+		ubi32_serdes_ports[i].line      = i;
+		ubi32_serdes_ports[i].iotype    = UPIO_MEM;
+		ubi32_serdes_ports[i].membase   =
+			(void __iomem *)ubi32_serdes_resource[i].uart_base_addr;
+		ubi32_serdes_ports[i].mapbase   =
+			(resource_size_t)ubi32_serdes_resource[i].uart_base_addr;
+		ubi32_serdes_ports[i].irq       =
+			ubi32_serdes_resource[i].uart_irq;
+		ubi32_serdes_ports[i].flags     = UPF_BOOT_AUTOCONF;
+
+		ubi32_serdes_hw_init(&ubi32_serdes_ports[i], 0);
+	}
+
+}
+
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+/*
+ * If the port was already initialised (eg, by a boot loader),
+ * try to determine the current setup.
+ */
+static void __init
+ubi32_serdes_console_get_options(struct uart_port *port, int *baud)
+{
+	u32 round_to = 1200;
+	u32 real_baud;
+
+	/*
+	 * We might get called before platform init and with no
+	 * kernel command line options, so port might be NULL.
+	 */
+	*baud = ubi32_serdes_default_baud_rate;;
+	if ( IO_PORT(port) == 0 )
+		return;
+
+	real_baud = port->uartclk
+		/ (16 * ((IO_PORT(port)->ctl0 & ~SERIAL_UBICOM_CTL0) + 1));
+
+	*baud = ((real_baud + round_to - 1) / round_to) * round_to;
+
+	pr_debug("%s:baud = %d, real_baud = %d\n", __FUNCTION__, *baud, real_baud);
+}
+#endif
+
+#if defined(CONFIG_SERIAL_UBI32_SERDES_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
+static struct uart_driver ubi32_serdes_reg;
+
+static int __init
+ubi32_serdes_console_setup(struct console *co, char *options)
+{
+	struct uart_port *port;
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+	int baud = ubi32_serdes_default_baud_rate;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+#endif
+
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	if (co->index == -1 || co->index >= NR_PORTS)
+		co->index = 0;
+	port = &ubi32_serdes_ports[co->index];
+
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+	if (options) {
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+		ubi32_serdes_hw_init(port, baud);
+	}
+	else
+		ubi32_serdes_console_get_options(port, &baud);
+
+	return uart_set_options(port, co, baud, parity, bits, flow);
+#else
+	return 0;
+#endif
+}
+#endif /* defined (CONFIG_SERIAL_UBI32_SERDES_CONSOLE) ||
+				 defined (CONFIG_EARLY_PRINTK) */
+
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+static void
+ubi32_serdes_console_putchar(struct uart_port *port, int ch)
+{
+	if ( IO_PORT(port) ) {
+		while (!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE))
+			barrier();
+		ubi32_serdes_put_char(IO_PORT(port), ch);
+	}
+}
+
+/*
+ * Interrupts are disabled on entering
+ */
+static void
+ubi32_serdes_console_write(struct console *co, const char *s, unsigned int count)
+{
+	struct uart_port *port = &ubi32_serdes_ports[co->index];
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&port->lock, flags);
+	uart_console_write(port, s, count, ubi32_serdes_console_putchar);
+	spin_unlock_irqrestore(&port->lock, flags);
+
+}
+
+static struct console ubi32_serdes_console = {
+	.name		= UBI32_SERDES_NAME,
+	.write		= ubi32_serdes_console_write,
+	.device		= uart_console_device,
+	.setup		= ubi32_serdes_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+	.data		= &ubi32_serdes_reg,
+};
+
+static int __init ubi32_serdes_console_init(void)
+{
+	ubi32_serdes_init_ports();
+	register_console(&ubi32_serdes_console);
+	return 0;
+}
+console_initcall(ubi32_serdes_console_init);
+
+#define UBI32_SERDES_CONSOLE	&ubi32_serdes_console
+#else
+#define UBI32_SERDES_CONSOLE	NULL
+#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */
+
+
+#ifdef CONFIG_EARLY_PRINTK
+static __init void ubi32_serdes_early_putc(struct uart_port *port, int ch)
+{
+	unsigned timeout = 0xffff;
+
+	while ((!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE)) && --timeout)
+		cpu_relax();
+	ubi32_serdes_put_char(IO_PORT(port), ch);
+}
+
+static __init void ubi32_serdes_early_write(struct console *con, const char *s,
+					unsigned int n)
+{
+	struct uart_port *port = &ubi32_serdes_ports[con->index];
+	unsigned int i;
+
+	for (i = 0; i < n; i++, s++) {
+		if (*s == '\n')
+			ubi32_serdes_early_putc(port, '\r');
+		ubi32_serdes_early_putc(port, *s);
+	}
+}
+
+static struct __init console ubi32_serdes_early_console = {
+	.name = "early_US",
+	.write = ubi32_serdes_early_write,
+	.device = uart_console_device,
+	.flags = CON_PRINTBUFFER,
+	.setup = ubi32_serdes_console_setup,
+	.index = -1,
+	.data  = &ubi32_serdes_reg,
+};
+
+/*
+ * XXX Unused in our driver. Need to find out what the termios initialization is good/needed for.
+ */
+struct console __init *ubi32_serdes_early_init(unsigned int port_index,
+						unsigned int cflag)
+{
+	struct uart_port *uart;
+	struct ktermios t;
+
+	if (port_index == -1 || port_index >= NR_PORTS)
+		port_index = 0;
+	ubi32_serdes_init_ports();
+	ubi32_serdes_early_console.index = port_index;
+	uart = &ubi32_serdes_ports[port_index];
+	t.c_cflag = cflag;
+	t.c_iflag = 0;
+	t.c_oflag = 0;
+	t.c_lflag = ICANON;
+	t.c_line = port_index;
+	ubi32_serdes_set_termios(uart, &t, &t);
+	return &ubi32_serdes_early_console;
+}
+
+#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */
+
+static struct uart_driver ubi32_serdes_reg = {
+	.owner			= THIS_MODULE,
+	.driver_name		= "ubi32_serdes",
+	.dev_name		= UBI32_SERDES_NAME,
+	.major			= UBI32_SERDES_MAJOR,
+	.minor			= UBI32_SERDES_MINOR,
+	.nr			= NR_PORTS,
+	.cons			= UBI32_SERDES_CONSOLE,
+};
+
+static int ubi32_serdes_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+
+	if (port)
+		uart_suspend_port(&ubi32_serdes_reg, port);
+
+	return 0;
+}
+
+static int ubi32_serdes_resume(struct platform_device *dev)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+
+	if (port)
+		uart_resume_port(&ubi32_serdes_reg, port);
+
+	return 0;
+}
+
+static int ubi32_serdes_probe(struct platform_device *dev)
+{
+	struct resource *res = dev->resource;
+	int i;
+
+	for (i = 0; i < dev->num_resources; i++, res++) {
+		if (res->flags & IORESOURCE_MEM) {
+			ubi32_serdes_resource[0].uart_base_addr = (void *) res->start;
+		}
+		else if (res->flags & IORESOURCE_IRQ) {
+			ubi32_serdes_resource[0].uart_irq = res->start;
+		}
+		else if (res->flags & UBICOM32_SUART_IORESOURCE_CLOCK) {
+			ubi32_serdes_resource[0].uart_clock = res->start;
+		}
+	}
+
+	ubi32_serdes_init_ports();
+
+	return 0;
+}
+
+static int ubi32_serdes_remove(struct platform_device *pdev)
+{
+	struct uart_port *port = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+
+	if (port)
+		uart_remove_one_port(&ubi32_serdes_reg, port);
+
+	return 0;
+}
+
+static struct platform_driver ubi32_serdes_driver = {
+	.remove		= ubi32_serdes_remove,
+	.suspend	= ubi32_serdes_suspend,
+	.resume		= ubi32_serdes_resume,
+	.driver		= {
+		.name	= "ubicom32suart",
+		.owner	= THIS_MODULE,
+	},
+};
+
+
+#ifndef MODULE
+/*
+ * Called at boot time.
+ *
+ * You can specify IO base, IRQ, and clock for the serdes serial port
+ * using kernel command line "serdes=0xiobase,irq,clock".  Values
+ * specified will be overwritten by platform device data, if present.
+ */
+static int __init ubi32_serdes_setup(char *str)
+{
+#define N_PARMS   (4+1)
+	int ints[N_PARMS];
+	int i;
+
+	str = get_options(str, ARRAY_SIZE(ints), ints);
+
+	for (i = 0; i < N_PARMS; i++) {
+		if (i < ints[0]) {
+			if (i == 0) {
+				ubi32_serdes_resource[0].uart_base_addr = (void *) ints[i+1];
+			}
+			else if (i == 1) {
+				ubi32_serdes_resource[0].uart_irq = ints[i+1];
+			}
+			else if (i == 2) {
+				ubi32_serdes_resource[0].uart_clock = ints[i+1];
+			}
+			else if (i == 3) {
+				ubi32_serdes_default_baud_rate = ints[i+1];
+			}
+		}
+	}
+	return 1;
+}
+
+__setup("serdes=", ubi32_serdes_setup);
+#endif
+
+static int __init ubi32_serdes_init(void)
+{
+	int ret;
+
+	pr_info("Serial: Ubicom32 serdes uart serial driver\n");
+
+	ret = platform_driver_probe(&ubi32_serdes_driver, ubi32_serdes_probe);
+	if (ret != 0) {
+		printk(KERN_INFO "serdes platform_driver_probe() failed: %d\n", ret);
+		return ret;
+	}
+
+	ubi32_serdes_init_ports();
+
+	ret = uart_register_driver(&ubi32_serdes_reg);
+	if ( ret == 0 ) {
+		ret = uart_add_one_port(&ubi32_serdes_reg, &ubi32_serdes_ports[0]);
+		if ( ret != 0 ) {
+			uart_unregister_driver(&ubi32_serdes_reg);
+		}
+	}
+
+	return ret;
+}
+
+static void __exit ubi32_serdes_exit(void)
+{
+	platform_driver_unregister(&ubi32_serdes_driver);
+	uart_unregister_driver(&ubi32_serdes_reg);
+}
+
+module_init(ubi32_serdes_init);
+module_exit(ubi32_serdes_exit);
+
+MODULE_AUTHOR("Rainer Keller <rkeller@ubicom.com>");
+MODULE_DESCRIPTION("Ubicom generic serial port driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(UBI32_SERDES_MAJOR);
+MODULE_ALIAS("platform:ubi32_serdes");